Late Friday a Hennepin County grand jury decided against charging an officer who shot and killed a teenager last October. But a group of community activists and members of the victim's family are skeptical. The police say 15-year-old Courtney Williams was holding a pellet gun when he was shot by officer Scott Mars. Family members say Williams didn't have the gun when he was shot. And they say there are other questions about the night of the shooting that don't make sense.